Tektronix WFM90, WFM91 WFM 90 and WFM 91 Service Manual 19, Table 15: Vector mode (Cont.)

Specifications
WFM 90 and WFM 91 Service Manual 1–9
Table 1–5: Vector mode (Cont.)
Category Description
Display Differential Phase REF: 1°.
REF: Measured with 140 IRE (1 V) linearity signal (5 step, 10 step, or Ramp)
with 40 IRE (300 mV) of subcarrier.
Display Differential Gain REF: 1%.
REF: Measured with 140 IRE (1 V) linearity signal (5 step, 10 step, or Ramp)
with 40 IRE (300 mV) of subcarrier.
Subcarrier Regenerator Pull-In Range REQ: NTSC: 50 Hz of FSC.
PAL: 10 Hz of FSC.
REF: Subcarrier Regenerator free-runs in absence of appropriate signal.
Reference can be burst of either displayed signal or external reference
signal.
Subcarrier Regenerator Pull-In Time REF: Pull-In Time: Within 1 second, with subcarrier frequency within 50 Hz
(10 Hz for PAL) of FSC.
Subcarrier Regenerator Phase Shift with
Subcarrier Frequency Change REQ: NTSC: 2° from FSC to (FSC + 50 Hz), or FSC to (FSC – 50 Hz).
PAL: 2° from FSC to (FSC + 10 Hz), or FSC to (FSC – 10 Hz).
Subcarrier Regenerator Phase Shift with Burst
Amplitude Change REQ: 2° from nominal burst amplitude to 6 dB.
REF: Internal or External burst reference.
Subcarrier Regenerator Phase Shift with Variable
Gain Control REQ: 1° as gain is varied from +3 dB to –6 dB.
Subcarrier Regenerator Phase Control Range REF: 360° continuous rotation.
Subcarrier Regenerator Burst Jitter REF: 0.5° RMS or less.
REF: With 140 IRE (1 V) composite video input. INT or EXT referenced.