HP 3580A Operating And Service Manual page 11

Section I
Model 3580A
Table 1-2. General Information.
INPUT CHARACTERISTICS (Standard 3580A)
Connector: female banana plug
Impedance: 1 megohm, 30 pF
Maximum (ac) Input Level:
Input
Sensitivity
+ 30dB (20 V) to -10dB (0.2 V)
- 20 dB (0.1 V) to - 70 dB (0.2 mV)
Maximum (de) Input Voltage:
±
100 V de
Coupling: capacitive
Maximum
Input
100 V rms
50 V rms
DC Isolation: none (input common referenced to frame ground)
INPUT CHARACTERISTICS (Option 002)
Selectable Input Configurations:
Unbalanced
Balanced Bridged
Balanced Terminated
Connector: female banana plug
Impedance:
Unbalanced: 1 megohm, 40 pF
Greater than 12 K (typically 14 K at 1 kHz)
Terminated: 600 ohms or 900 ohms
Maximum Input Levels:
Unbalanced: same as Standard 3580A.
Bridged: 100 V de max, 35
V
rms ac max.
Terminated: + 27 dBm at 0 V de. (See Paragraph 3-187).
DC Isolation:
Unbalanced: none (input common referenced to frame
ground)
Bridged and Terminated: floating input
AMPLITUDE CHARACTERISTICS:
1-2
Amplitude Modes:
Linear: Absolute measurements in rms volts (average
responding): relative measurements in percent of full scale.
Log 10 dB/div.: Absolute measurements in dBV (1 V rms
; 0 dBV) or dBm/600 ohms; relative measurements in dB.
Display sensitivity is 10 dB per division; display range is
>80 dB.
Log 1 dB/div.: Display sensitivity is 1 dB per division; display
range is 10 dB. Any 10 dB portion of 80 dB range can be
displayed by changing the AMPLITUDE REF LEVEL
control setting.
Full-Scale Sensitivity:
Linear Mode:
Calibrated: 20 V rms to 0.1 µV rms (18 ranges)
Uncalibrated: 100 V rms to 0.2 µV rms
Log 10 dB Mode:
Calibrated: + 30 dBV/dBm to - 70 dBV/dBm (11 ranges)
Uncalibrated:+ 40 dBV/dBm to - 60 dBV/dBm
Overload Indicator: An LED Overload indicator on the front
panel lights to indicate that the input signal exceeds the
maximum (full scale) input level set by the INPUT
SENSITIVITY switch and amplitude VERNIER.
Internal Calibration Signal: An internally generated calibration
signal can be used to calibrate the amplitude section
(following input attenuator) to an accuracy of
±
1.5% at
10 kHz. The calibration signal can also be used to verify the
frequency accuracy of the instrument.
FREQUENCY CHARACTERISTICS:
Frequency Range: 5 Hz to 50 kHz
Frequency Control: The front panel FREQUENCY control
tunes the frequency of the analyzer over the 0 Hz to 50 kHz
range. The control can be used to set either the start or
center frequency of linear or manual sweeps.
Coarse or Fine Tuning: Coarse tuning is selected by pushing
the crank toward the front panel; fine tuning is selected
by pulling the crank outward. In the coarse position, one
revolution of the crank changes the frequency by
approximately 2.7 kHz. In the fine position, one
revolution of the crank changes the frequency by
approximately 73 Hz.
Frequency Dial: Indicates start or center frequency in kHz.
Range: 00.0 kHz to approximately 50.8 kHz.
Resolution: 20 Hz (one minor division)
Typical Frequency Stability:
±
10 Hz/hr. after
± 5 Hz/°C
hour;
Bandwidth Settings: 1 Hz, 3 Hz, 10 Hz, 30 Hz, 100 Hz, 300 Hz
Bandpass Characteristic: closely approximates a gaussian
response.
Shape Factor: 10:1 on 1 Hz thru 100 Hz bandwidths; 8:1 on
300 Hz bandwidth
Equivalent Noise Bandwidth: Typically 12% wider than
absolute
3 dB bandwidth.
Display Smoothing (noise filtering):
3 Settings: min, med max
Response: determined by Bandwidth setting.
SWEEP CHARACTERISTICS:
Sweep Modes:
Repetitive: The instrument sweeps continuously over the
selected frequency range.
Single: The instrument sweeps one time over the selected
frequency range and stops at the end frequency.
Reset: Sweep is reset to left-hand side of screen; instrument
remains at start frequency of sweep.
Manual: The electronic sweep is disabled and a front panel
potentiometer is used to manually sweep the frequency