New Focus 3501 - Reference Output; Phase Shifter; Harmonic Locking

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Reference Output
Sync Out TTL level square wave, may be used as free running
oscillator when using EXT+, EXT- or V
ext
sync.
F
outer
TTL level square wave at the chopping frequency.
OUT1 TTL level pulse: 5·F
outer
in NORMAL mode
F
outer
- F
inner
in +/- mode
[H/S]·F
outer
in H/S mode.
OUT2 TTL level pulse: F
inner
in NORMAL mode
F
outer
+ F
inner
in +/- mode
[H/(7·S)]·F
sync
in H/S mode.
Phase Shifter
Range: -180.0° to +179.0°
Resolution: 0.1°, increasing to 0.25° at 6.4 kHz.
Harmonic Locking
Subharmonic (S): 1 - 15
Harmonic (H): 1 - 15
S and H may be set in any combination.
Operation
Mode S H OUT1 OUT2
H/S 1-15 1-15 [H/S]·F
sync
[H/(7·S)]·F
sync
+/- 1 12 F
outer
- F
inner
F
outer
+ F
inner
NORMAL 1 5 5·F
outer
F
inner
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