GENERAL INFORMATION
1-7
Pulse modulation
(optional fast pulse modulators are
available — see Option 7 or 11.)
Carrier frequency range: 32 MHz to 2.51 GHz, usable to 10 MHz.
RF output range: Maximum guaranteed output is reduced to +8 dBm (+20 dBm or +14 dBm with high
power option) when pulse modulation is selected.
RF level accuracy: When pulse modulation is enabled, adds ±0.5 dB to the RF level accuracy specification.
On-off ratio: Better than 45 dB below 1.2 GHz;
better than 40 dB above 1.2 GHz.
Rise and fall time:
Less than 10 μs.
Control:
Pulse input is on a rear-panel BNC with 10 kΩ nominal input impedance. An HCT logic 0
(0 V to 0.8 V) turns the carrier off, an HCT logic 1 (2.0 V to 5 V) turns the carrier on.
Maximum safe input is ±15 V.
Modulation oscillator
Frequency range: 0.01 Hz to 100 kHz.
Resolution: 5 digits. Minimum resolution 1 Hz.
Frequency accuracy: As frequency standard.
Distortion: Less than 0.1% THD at 1 kHz.
Waveforms: Sine wave to 100 kHz,
Square wave useable to 50 kHz
Triangle wave useable to 20 kHz.
Audio output: The modulation oscillator signal is available on a front-panel BNC connector at a level of
2 V RMS EMF from a 600 Ω source impedance.
Internal function generator
In function generator mode, the modulation oscillator output may be varied in frequency
and level. Internal modulation is disabled in this mode.
Level range: 1 mV to 4 V RMS EMF.
Resolution: 1 mV.
Source impedance:
600 Ω nominal.
Level accuracy at 1 kHz: ±5% + 5 mV.
Frequency response: Better than ±1 dB relative to 1 kHz.
External modulation
A front-panel external modulation input is provided.
Input level: 1 V RMS (1.414 V peak) sine wave for set deviation. Input sensitivity may be optionally
specified for 1 V peak (Option 10).
Input impedance:
100 kΩ nominal.
Modulation ALC:
The external modulation input can be leveled by a peak leveling ALC system over the
input voltage range of 0.75 V to 1.25 V RMS sine wave. High and low indicators on the
display indicate when the input is outside the leveling range.
Sweep mode
Control parameters Start and stop values of carrier frequency.
Linear sweep Frequency step size of 1 Hz minimum.
Logarithmic sweep Percentage increment of 0.01% to 50% in 0.01% steps.
Step time 50 ms to 10 s per step.
Trigger A trigger input is available on a rear-panel BNC connector and can be set to single,
continuous, start/stop or single step mode.
Frequency standard
TCXO: 10 MHz.
Temperature coefficient:
Better than ±7 in 10
7
over the temperature range 0 to 55°C.
Aging rate: Less than ±1 in 10
6
per year.
External input: Rear-panel BNC connector accepts an input of 1 MHz or 10 MHz at a level of 220 mV
RMS to 1.8 V RMS into 1 kΩ.
Output:
Rear-panel BNC connector provides an output of 10 MHz at a nominal level of 2 V pk-pk
into 50 Ω.
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