Philips ADAT-4 - Manual (Page 15)

ADAT-4 User Guide Page 9
ADAT-4 Troubleshooting
The table below lists ADAT-4 problems and solutions.
Problem Procedure
No output. • Check Power by Green LED.
Outputs are all
silent. • Check Input ERROR LED.
• Verify that the source is not silent.
Input ERROR. • Unplug the fiber cable and check for visible red light (this is not harmful).
• If no light, unplug the cable from the source and check for visible red light
from the transmitter.
• Check for possible break in the fiber.
NOTE Please contact the GPS factory if the problem still exists after completing the
above procedures.
ADAT-4 Specifications
This section provides audio, remote, and environmental specifications, plus a table of ADAT-4
channel routing.
Audio Specifications
Parameter Specification
Dynamic Range
24-bit processing 138 dB
20-bit processing 120 dB
ADAT Input
Peak wavelength 660 nm
Input sensitivity Adequate sensitivity to receive a signal transmitted at -17 dBm over 1 meter of
plastic fiber (Sharp GP1C321) without errors.
Sample frequency 30–50 KHz
A Model — AES3 Outputs (110 Ω Termination)
Amplitude 2–7 V p-p
Rise time 5–30 ns
Output impedance 110 Ω ±20% (0.1–6 MHz)
Common mode <-30 dB (0–6 MHz)
B Model — AES3id Outputs (75 Ω Termination)
Amplitude 1 ±0.2 V p-p
Rise time 37 ±7 ns
Output impedance 75 Ω
Return loss >15 dB (0.1–6 MHz)
DC on output <50 mV