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Model 8690B
Page 13
86988 Specifications
(Installed in 8690B Sweep Oscillator)
FREQUENCY CHARACTERISTICS
Range: Low range, 0.4 -11 MHz; high range, 4-110 MHz.
Accuracy: (CW, AF center frequency, end points of start-
stop and marker sweep; except when 8690B is in Ext
FM mode.)
Low Range: ±1% of frequency ±50 kHz.
High Range: ±1% of frequency ±500kHz.
Linearity: ±0.5% of sweep width.
Harmonics and Spurious Responses:
Non-Harmonics: At least 35 dB below CW output.
Harmonics: (Output levels below +10 dBm) At least
30 dB below CW output.
Residual FM: (CW and Sweep)
Noise in a 10 kHz bandwidth including line related
components:
Less than 300 Hz rms, low range.
Less than 1 kHz rms, high range.
Combined Incidental and Residual FM with internal
square wave modulation:
Less than 600 Hz rms, low range.
Less than 2 kHz rms, high range.
Residual AM: AM noise modulation index (rms, 10 kHz
bandwidth) is less than -40 dB.
OUTPUT CHARACTERISTICS
Level: +13 to -110 dBm. Output is calibrated in 10 dB
steps and at +13 dBm. Uncalibrated vernier provides
continuous level settings over entire range.
Accuracy: ±1.5 dB at any calibrated level.
Flatness: ±0.3 dB over full range.
Impedance: 50
n,
SWR <1.2 on 0 dBm step and below.
RF Leakage: Conducted and radiated leakage limits are
below those specified in MIL-I-6181D.
SWEEP CHARACTERISTICS
(Operating controls are located on the 8690B)
Start-Stop Sweep: Sweeps from "start" to "stop" dial
setting.
Marker Sweep: Sweeps from "Marker 1" to "Marker 2"
dial setting.
In both Start-Stop and Marker Sweep, dial settings are
continuously and independently adjustable over the en-
tire frequency range and can be set to sweep either up
or down in frequency.
AF Sweep: Sweeps upward in frequency, centered on CW
dial setting.
AF Width Accuracy:
Low Range: ±3% of sweep width or ±20 kHz, which-
ever is greater.
High Range: ±3% of sweep width or 200 kHz, which-
ever is greater.
Sweep Speeds: Continuously adjustable in four decade
ranges 0.01 to 100 seconds/sweep, or with manual con-
trol from front panel, providing continuous tuning over
preset limits.
Sweep Modes: Automatic [free running), line synchro-
nized, or triggered by either front panel pushbutton or
external pulse.
Sweep Indicator: Front panel indicator lights during sweep
duration.
MARKERS
(Controls on 8690B)
Two frequency markers, independently adjustable over
the entire frequency range, amplitude modulate the RF
output. Marker amplitude is adjustable from the front
panel.
Marker Accuracy:
Low Range: ±1% of frequency ±50 kHz.
High Range: ±1% of frequency ±500 kHz.
Resolution:
Low Range: ±5kHz.
High Range: ±50 kHz.
Marker Output: Triangular pulse, typically -5 V peak
into 1 kO.
MODULATION
Internal AM: Square wave modulation continuously ad-
justable from 950 to 1050 Hz. On-off ratio (level vernier
in calibrated position) is 20 dB.
External AM:
Bandwidth: DC to 5kHz at 30% modulation.
Sensitivity: -10 V reduces RF output at least 20 dB
(level vernier in calibrated position).
IJ?.put Impedance: Approximately 1 kO.
External FM: (Sweep selector in "manual" position)
Bandwidth: Deviations to the band edges are possible
for rates to 100 Hz. Smaller deviations possible at
rates up to 10 kHz.
Sensitivity: Deviation from CW setting is approximately
6% of frequency band per volt.
CRYSTAL CALIBRATOR
Internal 5 MHz crystal allows frequency calibration to
±0.01% at any 5 MHz multiple using front panel fre-
quency vernier.
AUXILIARY OUTPUTS
(Rear Panel)
Sweep Reference Output: Provides voltage analog to fre-
quency output. Approximately 1 V /MHz on low range,
1 V /10 MHz on high range.
Uncalibrated RF Output: -5 dBm minimum.
VTO Output: -15 dBm minimum. 200.4- 310 MHz.
Auxiliary Output: Always 0.4 -11 MHz, for low frequency
counter monitoring.
GENERAL
Power: Supplied by HP 8690B Sweep Oscillator.
Weight: Net, 11lb (5,0 kg). Shipping, 18 lb (8,2 kg).
Dimensions: 41/z in. wide, 71/4 in. high, 171/z in. deep
(115 mm x 185 mm x 445 mm).
Price: Model 8698B, $1,550.00.
Options:
001: 75
n
output impedance (BNC), add $50.00.
004: Rear panel RF output, add $75.00.
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