Grass Valley Thunder 80 v.1.0 - Manual (Page 61)

45
Thunder
User Guide
Standard TW (RTS®) Party Line Interface; “TW” “MODE” selected
Channel 1 audio and 30Vdc power on XLRs-A&B pin 2, Channel 2 audio on XLRs-A&B
pin 3
Audio Level (properly nulled): ................ 2VP-P ±5%, 70Hz to 20kHz
30Vdc ............................................................... +0/-8Vdc on XLRs-A&B pin 2 only when the
“Power” switch is in the “WET” position
Termination: .................................................. ≈200 ohm termination engaged only when the
“Power” switch is in the “WET” position
Data Specifications
Data Bolt Card
RS-232 Mode
Input Voltage Range: ....................................... >±3VP-P to <±25VP-P (.5V internal hysteresis)
Input Bias current: ............................................ ±100μA maximum
Input Impedance: ............................................. 33kΩ ±5%
ESD tolerance: .................................................... ±15kV Air-Gap,
±8kV Contact,
±15kV HBM
Output Voltage: ................................................. ±5.5VP-P @ ±5%, R
load
≥3KΩ
Data Rate: ............................................................ DC to 160k
baud
(High speed limit determined by
asynchronous sampling rate. Jitter is fixed @
320nsec. Higher data rates (up to 1M
baud
maximum) are possible if equipment driven
has greater jitter tolerance).
RS-422, RS-485 Modes
Input Voltage Range: ....................................... 100mV to 12V differentially across “+” and “-“
data input pins or 50mV to 6V on either input
with respect to GND (50mV internal hysteresis)
Input Common Mode Range: ...................... +1.65Vdc ±10%
Input Bias current: ............................................ ±600μA maximum
Input Impedance: ............................................. 33kΩ ±5%
(For data rates ≥20kb/Sec and/or multi-drop
applications with longer cable lengths, an
external 110Ω resistor is recommended across
the “+” and “–“ data inputs of the unit furthest
from the driving source to properly terminate
the line. This will minimize random bit errors
induced by cable reflections.).