1250 Frequency Response Analyzer Specification
12600012_Gmacd/CB 16-3
PLOTTING
General
Data source: single channel or point-to-point
Parameters, X or Y axis: a, b or r
log r (dB)
θ (degrees)
f (linear scale)
f (log scale)
Type of plotter: analog * or digital (GPIB)
Type of plot: point (separate points)
vector (joined points)
Plot size: A3 or A4 or adjustable in 0.025mm steps
Digital plotting
Compatible with Enertec-Schlumberger and
Hewlett Packard plotters.
Interface: built-in IEEE488
Analog plotting*
Interface: option 12503
Connector: D-type, 25 way
X,Y drives, bottom left: 0V, 0V
top right: 10V, 10V
Pen drop delay selectable: 0.4, 0.6, 0.8 or 1.2s
SYNCHRONISER* option 12501
Input Configuration
Connection: differential, rear terminals
Coupling: dc or ac (<3dB at 3Hz)
Impedance, Hi or Lo to ground: >200kΩ,<100pF
Common mode rejection,
dc coupling, up to 100Hz: >50dB
maximum rejected: 20V
Maximum input, Hi or Lo to ground:
350V peak, 250Vrms
Synchronisation
Frequency range: 1mHz to 65kHz
Sensitivity: 0.25V
Level adjustment: ±5V in steps of 0.02V
Time to synchronise: the longer of 4 cycles or 500ms
MODULATOR-DEMODULATOR option 12502
Input configuration
Two independent carrier inputs.
Connections: differential, rear terminals
Coupling: ac
Impedance, Hi or Lo ground: >100kΩ, <100pF
Common mode rejection, up to 100Hz: >50dB
Maximum common mode: 300V
Maximum input, Hi or Lo to ground:
350Vpeak, 250Vrms
Carriers 1 and 2
Frequency range: 48Hz to 20kHz
Voltage range: 6V to 250Vrms
* Not available with 1250N
Generator output
May modulate either Carrier 1 or Carrier 2.
Carrier phase shift, 50Hz to 300Hz: <3°
300Hz to 3kHz: <1°
3kHz to 20kHz: <6°
Analyzers
Either carrier may demodulate any analyzer.
Quadrature rejection, 1250: >26dB
1251: >14dB
Limits of error, when demodulating:
Mod frequency = 0.05 x carrier. Input > 10% full
scale, integration 200ms.
r (% reading): <0.5
log r (dB): <0.05
θ, single channel (degrees): <0.5
θ, point-to-point (degrees): <1
INTERFACES standard fittings
Serial port compatible with RS423 and RS232
Selectable data rates: 110, 150, 300, 600, 1200
2400, 4800, 9600 baud
GPIB port IEEE488 (1978)
Fully programmable talker / listener.
Switch selected talk only.
Maximum data rate: 1000 bytes/s
Functions implemented: SH1, AH1, T5, TE0,
L4, LE0, SR1, RL1, PP2, DC1, C0, DT0
GENERAL
Power supply: switch selected, 90V to 127V
or 188V to 265V
45 to 440Hz
Power consumption: 230VA max.
Memory battery, charged when mains is on:
discharge time: >100hr
charge from fully discharged: <2hr
Environmental: temperature, operating: 0 to 50°C
storage: -30 to 70°C
temp for specified limits: 20±10°C
humidity, non-condensing: 95%
Safety
complies with EN61010-1
Electromagnetic Compatibility
(1250B/E & 1254A only)
complies with EN50081-1 and EN50082-1
Dimensions:
height: 176mm (6.93in.)
width: 432mm (17in.)
depth: 573mm (22.56in.)
Weight: 18kg (40lbs)
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