HP 8360

User’s Handbook

decreases by 10 dB. For every +lV, increases by 10 dB. So the dynamic range of positive to negative power levels is dependent on the synthesizer power level setting.

The input impedance for this input connector is factory set at 500, but can be switched to 2 kfl. Refer to “Adjustments” in the Calibration manual. See “Specifications” for the electrical requirements of the AM input. Damage levels for this input are >+15V or <-15V.

AUX OUTPUT provides a reference signal from 2 to 26.5 GHz at a typical minimum power level of -10 dBm. Nominal input impedance is 50 0.

EXT ALC allows the synthesizer to be externally leveled. This input is used for power meter leveling or negative crystal detector leveling. Input impedance in crystal or meter leveling modes is nominally 1 MR. See “Specifications” for the signal requirements. Nominal input impedance is 100 kR.

FM INPUT accepts a -8 to +8V signal when on the 1 MHz/V sensitivity, or a -1 to +lV signal when on the 10 MHz/V sensitivity. Any signal greater than these limits will cause distortion. The deviation changes linearly as the FM input changes from 0 to its upper or lower voltage limit. The input impedance for this input connector is factory set at 500, but can be switched to 60052. Refer to “Adjustments” in the Calibration manual. Damage level for this input is >15V or <-15V.

PULSE INPUT is TTL compatible. A TTL high input (>+2V) causes a maximum selected RF power output, while a TTL low input causes minimum RF output (>80 dB RF on/off ratio). Nominal input impedance is 50 R. When using internal pulse generator, a TTL-level pulse sync signal preceding the RF pulse by nominally

70 ns is produced at this connector. The electrical requirements of the PULSE INPUT are detailed in “Specifications”. The damage levels for this input are >+5.5V or I-0.5V.

PULSE SYNC OUT (Option 002 only) Outputs a 50 ns wide TTL pulse synchronized to the leading edge of the internally-generated pulse.

PULSE VIDEO OUT (Option 002 only). Outputs the pulse modulation waveform that is supplied to the modulator. This can be either the internally- or externally-generated pulse modulation.

SWEEP OUTPUT provides a voltage range of 0 to i-10 V. When the synthesizer is sweeping, the SWEEP OUTPUT is OV at the beginning of the sweep and +lOV at the end of the sweep regardless of the sweep width. In CW mode, the SWEEP OUTPUT ranges from 0 V at the synthesizer minimum frequency to +lO V at the specified maximum frequency, with a proportional voltage for frequencies between the specified minimum and maximum. When the synthesizer is in manual sweep operation the sweep output voltage is a percentage of the span. Minimum load impedance is 3 kR.

Operating and Programming Reference C-5