Using JVC HM-DH30000 series decks with
DTC100 equipped with HDVR-100-2
Document version 1.5.2 Ė 20 March 2002
© 2002 Sixteen Nine Time
NOTE: These instructions are specifically for HDVR firmware version 1.5.
Recording with One JVC Deck
The channel recorded, start and stop times are all selected using the timers feature of the DTC100 menu. The JVCís timers are not programmed for DTV recording. Since the JVC deck is controlled by the same single firewire connection that conveys the DTV signal from DTC100, do not use the wired Infrared transmitter feature of the DTC100.
Monitoring the Signal
Both the JVC deck and the DTC100 have outputs that permit connection of video and audio devices for watching and listening to the program material. These outputs have the flexibility to present signals from various sources. The differences between with regard to the Sixteen Nine Time HDVR recording adapter is discussed below.
The DTC100 outputs work exactly like a DTC100 without the recording adapter except when an ATSC tape is being played on a connected deck. When this playback is sensed and the DTC100 is tuned to an active OTA DTV channel, the tape playback will appear on the DTC100ís outputs. Note that firmware version 1.5 does required that the DTC100 be tuned to an active OTA DTV for the playback through the DTC100 to properly function. It doesnít matter if the signal tuned to is HD or SD.
NOTE: When the DTC100 is to be used for tape playback, it is suggested that the DTC100 menu function called "ACQUIRE OFF AIR GUIDES" be DISABLED.
The DTC100 on-screen menus are only available on the DTC100ís outputs, and include such information as channel tuning, and timer programming. On-screen menus from the JVC deck do not appear on the DTC100 outputs. Only the tape playback signal sent via the firewire from the JVC deck appears on the DTC100. Note that the tape playback signal for copy protected tapes or tapes that have foreign content, such as Japanese BS tapes, do not appear on the DTC100ís outputs.
When multiple channels (sub-channels) are present, either during a broadcast, or when playing it back from tape, the DTC100ís usual tuning features allow selection of the particular sub-channel that is displayed.
JVC deck outputs
The JVC deck outputs operate in exactly the usual manner in accordance with the particulars of the model type, except that when the DTC100 is selected for input on the JVCís firewire input and if the DTC100 is tuned to an OTA DTV channel, and the JVC is not in the tape playback mode, the JVCís outputs will then present the decoded DTV picture and sound that the DTC is sending via the firewire. Note that this signal is displayed on the JVC at any time when it is not in the playback mode. Thus, the JVC functions as a Component-Video HDTV converter and can be used to view DTV on component video displays. In this way, even though the I-link is a digital firewire input, when it is selected the signal immediately appears on the deckís outputs, in an operational fashion similar to what weíve come to expect from composite and tuner input selections. Note that after switching channels on the DTC from a non-OTA / DTV channel and back, it may take up to 10 seconds for the JVC deck to recognize the DTV signal and again present it at its outputs.
Although the OTA H/DTV signal from the DTC100 is presented on the JVC deckís outputs, the on-screen display information from DTC100 does not appear on the JVC deckís outputs.
We have not yet determined a method with the JVC deck to select a particular sub-channel for presentation on its outputs when multi-sub-channels are contained in the DTV signal from the firewire input. The implication of this is that during tape recording, the user may not choose a particular sub-channel for display on the JVC deckís outputs. This is different during tape playback. During tape playback, the channel up and down button allows selecting a particular sub-channel for display on the JVCís outputs.
Note that when compared, the audio and video outputs of DTC100 may slightly time shifted with respect to each other. This can cause the audio output of the JVC to be slightly out of sync with the video output of the DTC100, and vice-versa. The implication of this is that both the audio and video should be used for presentation from one machine at a time, and not intermixed, or they may appear to be out of synchronization.
Recording and Timer Recording with Multiple JVC Decks Connected
It is possible to connect several JVC decks to the DTC100 firewire using the multiple ports, as illustrated in the JVC instructions. Note that the DTV signal from the DTC100 will be simultaneously sent to each deck that has selected the DTC100 as its input source. This means that each deck can display and record the signal in parallel with the other connected decks.
During timer control, the DTC100 will issue the commands to effect recording to only one connected JVC deck via the firewire. To facilitate this, the DTC100 selects the particular deck to record to in a predictable manner. The deck that will be recorded to will be the deck that has only one of its firewire ports used. To illustrate this, suppose there are three connected JVC decks. Deck 1 plugs into one of the DTC100ís firewire jacks, and the other jack on the DTC100 is unused. Deck 2 plugs into the 2nd firewire port on Deck 1. Deck 3 plugs into the 2nd firewire port on Deck 2. Deck 3ís 2nd firewire port is unused. In this example, since Deck 3 has only one of its firewire ports used, it will be selected for timer recording by the DTC100. Note that if there is more than one JVC deck with only one of its firewire ports used, it will be unpredictable which of the decks will be selected for timer recording control.
NOTE: When setting up to record under DTC100 timer control when there are multiple JVC decks connected, make sure the deck to be recorded to is turned off while it has the DTC100 selected as the firewire input. If the DTC100 is turned off or looses signal while the JVC deck is turned on, the JVC deck will attempt to find another I-link firewire source and in doing so will select one of the other JVC decks as its firewire input. This will result in the wrong source being selected by the recording deck.
Since the DTC100 outputs its firewire signal to all connected JVC decks, it is possible to use external timer control devices to record many TV programs on many channels with multiple decks. We have tested this with three decks, although we believe that as many as six decks should also work. The external control in this case would be a programmable remote control. There are many brands and models of these available. The minimum configuration would be one such as the One For All model URC 8780 that provides up to 10 timed macros up to 7 days in advance. This one is mentioned since it is very economical, though more sophisticated units are applicable. Programming them is beyond the scope of these instructions. It is also possible to use one DTC100 with HDVR for each JVC deck, and through the DTC100ís built in timer, avoid the need for an external remote control.
Assignment of Input Numbers
The JVC deck automatically assigns a unique I-number for each firewire device that is connected to it. It does this by reading an electronic serial number, assigning a unique number to a device the first time it senses it, and then remember that serial number and always associating the I-number with that serial number. Unfortunately in systems with multiple decks, this can lead to some confusion as to the identity of a particular unit. For example, the DTC100 may be I-2 on one JVC deck, and I-3 on another deck. For those people that would find it more desirable to have the each firewire device referred to as the same number on each machine, JVC does provide for a method to edit the I-numbers. Please refer to the JVC instruction manual for this procedure. To determine the number the currently corresponds to the DTC100 on each particular deck, use the JVC deck channel up/down and make a note of all the I-numbers the deck senses. Then unplug the DTC100, and note which of the I-numbers no longer appears when using the channel up/down button on the deck.
Deck to Deck Dubbing
Deck to Deck H/DTV dubbing with the HDRV / DTC100 operates in the same manner as the usual deck to deck dubbing. To avoid contention between decks and the DTC100 outputting a DTV signal simultaneously, it is suggested that during dubbing the DTC100 not be selected as the firewire source by any connected deck. Through this, the DTC100 will display the playback signal of any connected deck when that signal is detected.
Attenuation of Playback Problems
Occasionally the playback signal presented by the DTC100 or JVC deck will have glitches, distortions, loss of audio, loss of audio / video synchronization, or picture break up and pixel blocking. This is sometimes due to data errors in the tape playback signal. When it appears that the audio and / or video are not automatically corrected, the user may need to force the equipment to return to a known state of operation through such means as pressing the HD button, waiting, and then pressing it again, or pressing stop on the deck and then play, or by powering down the deck through its front panel switch, or by unplugging and re-plugging the firewire connector at either end, or by removing AC power for a minimum of ten seconds from the DTC100 and then reapplying power. This is an unusual occurrence. When these type of errors occur often, it may be due to bad tape media, or equipment may need servicing.
Connection of Other Devices
It is recommended that a Panasonic TU-DST50 or 51 series STB not be connected into the daisy chain firewire connection while the JVC deck is in that chain. Other 169Time equipped STB devices may be connected in the firewire daisy chain. If other connected 169Time STBs also have version 1.5 firmware, they may be selected using the input select feature of the JVC deck. To avoid contention, it is suggest that only one 169Time device be selected as the source at an one moment by all JVC decks. When an ATSC compatible DTV data stream is present on the firewire, whether from a deck output or from another 169Time equipped STB, other 169Time equipped DTC100(s) sharing the firewire connection will present the decoded DTV signal on its outputs. For example, if a DTC100 and a UM STB, both equipped with the HDVR are simultaneously connected to a JVC deck, the DTC100 can display the data stream output by either its own DTV turner, or the JVC deck, or from the UM depending on the input selection and playback mode of the JVC deck.
Sixteen Nine Time does not guarantee compatibility with any product. However, we strive to make our product compatible with other devices when practical.