HP 1141A 200 MHz Differential Probe

The HP 1141A is a 1X FET differential probe with 200 MHz bandwidth and 3000:1 CMRR (Common Mode Rejection Ratio) at 1 MHz. The probe has an input resistance of 1 M ohm, and low input capacitance of 7 pF to minimize circuit loading. The HP 1141A 200 MHz Differential Probe must be used with the HP 1142A Probe Control and Power Module. It can be connected to any instrument with 50 ohm inputs. An external 50 ohm termination can also be used with high impedance inputs.

• Superior tolerance to ESD
  The HP 1141A and 1142A make a contribution to reliability through use of over-voltage protection circuitry which decreases the probe's susceptibility to damage from electrostatic discharge and other accidental exposure to excessive voltage.
• Low dc thermal drift
  The probe's dual-path amplifier design provides superior dc stability by reducing dc drift to less than 50 µV dc per degree centigrade.
• +/-200 V (dc + peak ac) maximum allowable input without attenuators
  Two attenuators, 10X and 100X, are provided to expand the dynamic range of the inputs up to +/-30V. An ac coupling adapter is also provided for those cases where input dc voltage level prevents dc reject from being used.
• Dc offset and dc reject
  The HP 1142A Probe Control and Power Module controls input coupling modes dc, dc with variable offset, and dc reject. Dc reject, like ac coupling, blocks the dc component in a signal without degrading low-frequency CMRR which occurs when ac coupling is accomplished by use of blocking capacitors. Variable offset capability in the HP 1142A allows viewing of very small signals on large dc voltages, without attenuating low frequency ac components or causing sag from ac coupling.
• Remote control input coupling and offset
  For automatic test applications, coupling and offset functions provided by the HP1142A probe control and power module can be remotely controlled through a connector on the rear panel of the module. Contact closures or electrically isolated TTL compatible control signals may be used. DC offset may be remotely controlled through use of an electrically isolated dc reference voltage applied at the remote control connector.
• Rugged construction
  The HP 1141A has been designed to be rugged. Special attention has been placed on isolating critical parts from shock. With a shell molded of tough ABS-Polycarbonate, the HP 1141A is built for long life and dependability.

Operating Characteristics



Bandwidth:                  dc to 200 MHz (-3 dB)*



Rise Time:                  1.75 ns (calculated by 
                                   rise time = 0.35/bandwidth)



CMRR:                       See Photo



DC Gain Accuracy:           2%



DC Attenuator Accuracy:     2%



Linear Differential Input 
Range:                      +/-0.3V (1X)
                            +/-3.0V (10X)
                            +/-30V (100X)



DC Offset:                  +/-20V  (1X)
                            +/-200V (10X)
                            +/-500V (100X)



Common Mode Operating 
Range:  
                            dc:  +/-20V (1X)
                            +/-200V (10X)
                            +/-500V (100X)
                            dc to 30 Hz:  linearly decreased
                            to 30 Hz value.
                            30 Hz to 200 MHz:
                            +/-0.5V (1X)
                            +/-5V (10X)
                            +/-50V (100X)
                            (voltages are peak  
                            voltage)



Maximum Allowable Input 
Voltage:                    200V (dc + peak ac) (1X)
                            500V (dc + peak ac) with 
                            attenuators
                            Common or differential
                            modes



Input Coupling:             dc, dc with variable offset, 
                            dc reject, and ac.  Dc coupling 
                            choices and dc reject may be 
                            selected by pushing buttons on 
                            the HP 1142A front panel or 
                            through use of its remote 
                            interface.  Ac coupling is 
                            provided via an adaptor that 
                            attaches to the probe.  DC reject 
                            response (-3 dB) is selectable 
                            independent of attenuators 
                            at 5 Hz, 0.5 Hz or 0.05 Hz
             



AC Coupling Low Frequency 
Response (-3 dB):           15  Hz (1X)
                            1.5 Hz (10X)
                            1.5 Hz (100X)



DC Thermal Drift:           Less than or equal to 50
                            µV dc/degree C



Input RC:                             R          C(approximate)
                            1X      1  Mohm    7 pF                             
                            10X     9  Mohm    3.5 pF
                            100X    10 Mohm    2.0 pF



Output Termination 
Impedance:                  The HP 1141A, HP 1142A differential probe system is 
                            designedto drive 50 ohm input instruments.



*For maximum signal fidelity, above 100 MHz, limit probe 
output into 50 ohms to less than or equal to 300 mV p to p.



General Characteristics



Power Requirements:          90-132 Vac/198-264 Vac
                             47-440 Hz, 25 VA max



Temperature:                 Non-operating:  
                             -40 to 70°C
                             Operating:
                             0 to 55°C



Altitude:                    Non-operating:
                             up  to 15,300m (50,000 ft)
                             Operating:
                             up to 4,600m (15,000 ft)



Humidity:                    Non-operating:
                             90% relativeat 65°C
                             Operating:
                             95%relative at 40°C



Weight:                      1141A:  Net approx 0.45 kg (1.0 lb)
                                         Shipping approx 0.9kg (2.0lbs)



                             1142A:  Net approx 1.8 kg (4.0 lbs)
                                     Shipping approx 2.7 kg (6.0 lbs)      

HP 1141A      200 MHz Differential Probe

An HP 1142A Probe Control and Power Module must also be
ordered with each HP 1141A Probe.

Available accessories for this product include:

HP5959-9335 HP5090-4356 HP 1142A Probe Control and Power Module
HP 10100C 50 Ohm Feedthrough Termination

No literature is available online at this time.

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Related product families available online:

Differential Probes

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