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WFM 90 and WFM 91 Service Manual
Table 1–6: Synchronization
Category Description
Input Requirements REQ: Internal Reference: Composite video or black burst with sync amplitudes
40 IRE (300 mV PAL) "6 dB.
REQ: External Reference: Sync amplitude between 143 mV and 4 V will synchro-
nize sweeps.
External Reference Input REQ: DC Input Impedance (unterminated): w15 kW.
REF: Return Loss (75 W): w40 dB from 50 kHz to 6 MHz (with 75 W ter-
mination on, instrument power on).
REF: Absolute Maximum Input Voltage: "12 VDC plus peak AC.
Table 1–7: Physical characteristics
Category Description
Dimensions REF: Instrument:
5 inches (127 mm).
3.15 inches (80.0 mm).
9.6 inches (243.8 mm).
Shipping Box:
13.25 inches x 13.75 inches x 6 inches inside
14 inches x 14.25 inches x 6.25 inches outside
Weight REF: With batteries and pouch:
3 lbs, 9 oz.
Without batteries and pouch:
1 lb, 14 oz.
Shipping weight with packaging:
5 lbs, 14 oz.
Table 1–8: Environmental characteristics
Category Description
Operating Altitude REQ: To 15,000 feet (4572 meters).
REF: IEC 1010-1 compliance to 2000 meters.
Operating Temperature REQ: 0° to +50° C.
REF: IEC 1010-1 compliance to +40° C.
Equipment Type REQ: Measurement.
Installation Category REQ: Installation Category I (as defined in IEC 1010-1, Annex J).
REF: Rated for indoor use only.
Pollution Degree REQ: Pollution Degree 2 (as defined in IEC 1010-1).