Specification 1250 Frequency Response Analyzer
16-2 CWB/1250/Issue 9A
ANALYZER
1250: Two independent channels operating in parallel
Sensitivity
Nominal
Range
Integration
<100ms
Integration
≥≥100ms
Full-scale
peak
input
Com.
Mode
rejected
30mv
300mv
3V
30V
300V
10µV
100µV
1mV
10mV
100mV
1µV
10µV
100µV
1mV
10mV
50mV
500mV
5V
50V
500V
30V
30V
30V
500V
500V
Maximum input, Hi or Lo to ground: 500V peak
300V rms
Input configuration
Connection: differential, front or rear
Coupling: dc or ac (<1dB at 2.5Hz)
Impedance: Hi or Lo to ground: 1MΩ,<100pF
(front+rear sockets)
Common mode rejection, dc coupling, up to 100Hz:
up to 50V peak: >65dB
over 50V peak: >60dB Cross
channel isolation,
lkΩ across inputs, up to 10kHz: >100dB
Integration time:
minimum: the longer of 1 cycle or 10ms
maximum: 10
6
cycles or 10
5
s
Auto-integration:
minimum: the longer of 3 cycles or 1.5s
maximum: the programmed integration time
Variance in results, at 90% confidence:
long integration (signal >0.02% range): <1%
short integration (signal >0.2% range): <10%
Measurement delay
Variable from zero to 10
6
cycles or 10
5
s.
RESULTS
Single channel or point-to-point
Processing, applicable to any of above:
Multiplication by (jω)
n
where n = ± 1 or ± 2.
Division by a vector, specified as a + jb or r, θ
or as last displayed result
Limit check: high and low on a or b or r or log r or θ
pass or fail accepted
History file: stores up to 450 results after processing
and limit check.
outputs result with further limit check.
Forms of results: a + jb or r, θ or log r, θ
Resolution: a, b and r: *5 digits + exponent
log r: 0.01 dB
θ (degrees): 0.01°
θ (radians): 0.1mrad
Single channel, unprocessed, results are displayed as volts
or millivolts. When integration is < 100ms these are
resolved to 4 digits.
Accuracy, ambient temperature 20±10°C.
All ranges, integration >200ms, input >10% full
scale. Data valid for 1 year after calibration.
1250 converts from one co-ordinate form to another
with negligible arithmetic error.
GENERATOR
Identical specifications apply to the optional
additional sine (12506B and C) and cosine
(12506A) generators.
These options not available with 1250N.
Range Max
Resolution
Error
Frequency
10µHz to 65.535kHz
1 in 65536 <0.01%
Amplitude 10mV to 10.23V* 1 in 1023
<1%± 1 digit
(10mV to 1.100V 1 in 2047
<1%±
0.5mV)[P1]U
(1.100V to 11.00V 1 in 2047
<1%± 5mV)U
Bias -10.23V to +10.23V 1 in 1023
<1%± 1 digit
*5.11V for triangle waveform
Output is short-circuit proof.
Maximum output (bias + signal): 15V(21VU)peak
Output impedance: 50Ω(<2ΩU) + 2%
Maximum voltage, Lo to ground: 150V
Impedance, Lo to ground: 100kΩ,<100pF
Waveform:
Distortion, for sinewave: <1%
Stop control: immediate, or at 0°,90°,180° or 270°
Stop input: contact closure or TTL logic 0
Sweep: logarithmic, up or down
linear, up or down
harmonic
Maximum load capacitanceU: 1nF
Maximum load inductanceU: 10µH
U For 1250N
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