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Bi-level Pulse
• Return Loss: ≥30dB to 6 MHz
• Levels: NTSC: 286mV ± 14mV (40 IRE ±2 IRE)
PAL: 307mV (43 IRE)
• Rise Times (10-90%): NTSC 140ns ±20ns PAL:
200ns ±20ns
• Duration: NTSC: 4.7us ±0.1 us PAL: 4.7us ±0.2us
Error Messages
The following error messages may appear when starting your switcher.
GVG100 Protocol Supported Commands
The following tables list the Supported GVG100 commands and controls.
Table 5 Switcher Error Messages
Error Message Description Solution
DDR 0 Not Found
DDR 1 Not Found
DDR 0 & 1 Not Found
There is a problem with the switcher DDR
memory. The switcher may be used but
many features will be limited or disabled
Re-start your switcher. If the problem
persists, contact JVC Technical Support
for assistance.
Upgrade PMC?
Your switcher requires a Panel Module
Controller (PMC) upgrade as part of a
software upgrade. The switcher may be
used without the PMC upgrade but may
respond in an unpredictable manner
Allow the PMC upgrade to proceed.
Contact JVC Technical Support for
assistance if you are unsure about
upgrading your switcher.
Table 6 GVG100 Supported Commands
Name MLE/Keyer Length Byte Code Data/Notes
Read MLE Program Bus MLE 2 41 —
Read MLE Preset Bus MLE 2 42 —
Read Keyer Bus Keyer 2 43/44 —
Write MLE Program Bus
MLE 3 C1 <xpt> An invalid xpt request
returns a protocol error
Write MLE Preset Bus
MLE 3 C2 <xpt> An invalid xpt request
returns a protocol error
Write Keyer Bus
Keyer 3 C3/C4 <xpt> An invalid xpt request
returns a protocol error
Read Analog MLE/Keyer 3 45 <control>
Write Analog MLE/Keyer 5 C5 <control> <lsb> <msb>
Read Light On/off MLE/Keyer 3 46/47 —
Write Light On/off MLE/Keyer 3 C6/C7 <lamp>
Read Wipe Pattern MLE 2 48 —
Write Wipe Pattern
MLE 3 C8 <wipe> Valid wipes are 0-9, as
per the Wipe Pattern
button numbers. An
invalid wipe number
returns a protocol error.
Read Transition Mode MLE 2 4A —