Hewlett Packard - 4934A - Communications Test Set
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Hewlett Packard 4934A
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Equipment:
4934A
Date:
1988
Category:
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Information
The HP 4934A is a wideband (20 Hz to 110 kHz) Transmission
Impairment Measuring Set (TIMS). The transmission impairment
measurements which can be made are listed below.
Level Frequency
Noise
Noise with Tone
Signal to Noise
Impulse Noise
P/AR, (Peak to Average Ratio)
Noise to Ground
The HP 4934A can make measurements directly on leased lines
or on dial-up lines. It has loop holding capability, a
monitor speaker and butt-in connection (useful for talking
to the far end of the test line).
There are four permanently stored frequencies 404 Hz, 1004
Hz, 2804 Hz and 2713 Hz. Any other four frequencies may be
temporarily assigned and stored by the user.
The HP 4934A can test circuits using single frequency (SF)
signaling - use the SF SKIP feature. SF SKIP prevents the HP 4934A from transmitting signaling frequencies in the range
2600 Hz ±150 Hz.
1 Manual
User manual
Manual type:
User manual
Pages:
130
Size:
2.3 MB
Language:
english
Revision:
Manual-ID:
04934-90000
Date:
September 1988
Quality:
Scanned document, all readable.
Upload date:
Dec. 31, 2017
MD5:
249483ed-4bef-84b5-ede2-8aac484bf155
Downloads:
751
Information
Operating and Calibration Manual
1. Getting Started
Introduction...1-1
Switch-On...1-1
Front Panel Features...1-2
Demonstrating the HP 4934A 1-5
Demonstration 1...1-5
Demonstration 2...1-6
Error Codes...1-7
2. Making Measurements
Preliminary Setup...2-1
Connecting the HP 4934A to the Test Circuit...2-1
Dial and Hold...2-2
Dialing using the HP 4934A and a Butt-in...2-3
Receiving an Incoming Call and Holding the Line ... 2-4
Level and Frequency...2-6
Principles...2-6
Instrument Operation ...2-8
Message Circuit Noise...2-12
Principles...2-12
How it is Measured...2-14
Instrument Operation...2-15
Noise with Tone (Notched Noise)...2-16
Principles...2-16
How it is Measured...2-16
Instrument Operation...2-17
Signal to Noise...2-18
Principles . ...2-18
How it is Measured...2-18
Instrument Operation...2-19
Impulse Noise...2-20
Principles...2-20
Instrument Operation...2-21
P/AR (Peak to Average Ratio)...2-24
Principles ...2-24
How it is Measured...2-25
Instrument Operation...2-26
Noise to Ground...2-27
Principles...2-27
How it is Measured...2-27
Instrument Operation... . . . . 2-28
3. General Information
Introduction ...3-1
Specification...3-1.
Safety Considerations...3-1
Instruments Covered by Manual...3-2
Options Available ...3-2 Accessories upplied...3-3 Accessories Available...3-4
Specification...3-4
4. Installation
Introduction...4-1
Initial Inspection...4-1
Preparation for Use...4-2
Power Requirements...4-2
Line Fuse...4-2
Power Cable...4-3
Battery (Option 001 or Retrofit)... . . . 4-3
Mating Connectors (Front Panel)...4-3
Operating Environment...4-4
Storage and Shipment...4-4
Environment...4-4
Packaging...4-5
5. Performance Tests
Introduction...5-1
Calibration Cycle...5-1
Recommended Test Equipment...5-2
Operational Verification... . 5-3
Receiver Frequency...5-4
Receiver Level . . . ■... . 5-5
Weighting Filter 5-6
Impulse Noise Count...5-9
Loss of Holding Tone...5-10
Hold Circuit...5-11
Performance Tests...5-17
Transmitter Frequency Accuracy...5-18
Transmitter Level Range...5-19
Transmitter Level Accuracy...5-20
Transmitter Flatness at +10 dBm...5-21
Transmitter Flatness at —40 dBm...5-22
Transmitter Distortion...5-28
Receiver Frequency Range/Accuracy...5-31
Receiver Level Accuracy . ...5-33
Message Circuit Noise Accuracy...5-35
Notch Filter Rejection ...5-37
Signal to Noise Ratio Accuracy... . 5-39
Impulse Noise Threshold Accuracy...5-41
Noise to Ground Accuracy... 5-43
Peak to Average Ratio (P/AR) Accuracy...5-45
A. Service Accessory 1 (SA1) 20 dB Amplifier 4 kHz Filter Performance Test... A-l
B. Service Accessory 2 (SA2) Power Splitter/Adder
Performance Test... B-l