GENERAL INFORMATION
LF OUTPUT
Front panel BNC connector. The output may be configured in
either LF Generator Mode to give an output from the internal
modulation oscillator or in LF Monitor Mode to give an output
from the internal modulation signal paths.
Selection
By keyboard entry of data. Variation by
⇑
/
⇓
keys and by rotary
control.
Indication
7 digits with unit annunciators for frequency and 4 digits with
unit annunciators for level.
Level 100
μ
V to 5 V RMS with a load impedance of greater than
600
Ω
.
100
μ
V to 1.4 V RMS with a load impedance of greater than
50
Ω
.
Common mode voltage
±
0.5 V maximum.
Source impedance
5.6
Ω
nominal.
Level accuracy at 1 kHz With a load impedance of greater than 10 k
Ω
:
±
5% for levels above 50 mV and
±
10% for levels from 500
μ
V to
50 mV.
Frequency response
Typically better than
±
1 dB from 0.1 Hz to 300 kHz.
SWEEP
Control modes
Start/stop values of selected parameter;
Number of steps;
Time per step.
Step time
1 ms to 10 s per step.
Sweep ramp
Synchronized analogue ramp with an amplitude of nominally 0 V
to 10 V peak on rear panel BNC connector.
Markers
5 user selectable markers for frequency or level provide an
indication when specified parameter values have been reached.
Output 0 V to +5 V nominal from 600
Ω
on rear panel BNC
socket.
Trigger
Rear panel BNC connector. Applying 0 V or a switch closure
starts the sweep or steps the sweep from point to point. Socket is
internally connected via 10 k
Ω
pull-up resistor to +5 V.
FREQUENCY STANDARD
Frequency
10 MHz.
Temperature stability
Better than ±5 in 10
8
over the operating range of 0 to 50°C.
Warm-up time
Within 2 in 10
7
of final frequency within 10 minutes from switch
on at 20°C .
Aging rate
Better than 2 in 10
7
per year.
Output
Rear panel BNC socket provides an output at frequencies of 1, 5
or 10 MHz with a nominal 2 V pk-pk level into 50
Ω
. This
output can be disabled.
External input
Rear panel BNC socket accepts an input of 220 mV to 1.8 V RMS
into 1 k
Ω
at a frequency of 1, 5 or 10 MHz.
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