Tektronix WFM601, Service Manual

Page: 25 / 304

Specification
1–6
WFM 601 - Service Manual
Table 1–4:
SERIAL VIDEO DIAGNOSTICS
(EDH)
CATEGORY DESCRIPTION
Video Error Detection
REF: Type: Active picture and full field. Field rate resolution.
Uses CRC check word system. System is known as EDH (Error
Detection and Handling) in industry literature.
REF: Complies with SMPTE RP 165.
REF: Front panel EDH DET lamp.
REF: Sets error flag output through rear-panel REMOTE connector.
Alarm
REF:
Warns that a serial signal video error has occurred.
Detected Errors:
1. Video missing.
2. FF CRC error.
3. AP CRC error.
4. Any ESP flag set.
REF:
Front-panel ALARM lamp.
REF:
Sets error flag output through rear-panel REMOTE connector.
Table 1–5:
EXTERNAL REFERENCE
CATEGORY DESCRIPTION
Input REF:
Analog composite video, or black burst.
Maximum Operating Input Voltage
REF: –1.8V to +2.2V, dc plus peak ac.
Absolute Maximum Input Voltage REF: –8.5V to +8.5V, dc plus peak ac.
DC Input Impedance REF:
20 k .
Return Loss
40 dB to 6 MHz.
REF: Typically 46 dB to 6 MHz; 40 dB to 10 MHz.
Performance Verification Procedure Step
:
19