Equipment information

Fluke 1920A Frequency counter
Manufacturer:
Model:
1920A
Date:
1977
Category:
Group:
Description:

Information

The Fluke Model 1920A Digital Counter is a 5 Hz to 520 MHz (to 1 GHz or 1.25 GHz, optional) Counter de- signe d primarily for tele communications applications. The unit is compact and lightweight making it fully portable and suitable for field use. An optional battery-operated version of the Counter permits use at remote or mobile installations where AC line power is unavailable. 1-3. The display is nine digits, light-emitting-diode (LED) type with leading-zero suppression and automatic decimal point positioning. Display resolution is front-panel selectable at 1 kHz, 100 Hz, 10 Hz, 1 Hz or 0.1 Hz, Annunciators are provided to indicate the measurement unit (i.e. MHz, kHz, or Hz) and also overflow when the capacity of the display is exceeded. All displayed measurement data is provided by an optional Data Output Unit (DOU, Option -02). 1-4. Input sensitivity for the 1920A is better than 15 mV rms and AGC is incorporated to provide stable operation. Extremely low-level signals which cannot be reliably measured, fall below the AGC threshold and are ignored by the counting circuitry. A “burst5’ mode is provided to permit the measurement of keyed RF signals having a duration of two milliseconds or greater. The display is automatically held at zero if the RF burst is of shorter duration than the selected gate time (resolution). 1-5. The 1920A also incorporates an optional high- resolution mode (Option- -06) to permit the measurement of low frequency signals, such as signalling tones, while using conveniently short gate times, in this mode, input signals in the range of 10 Hz to 10 kHz are multiplied by a factor of 1000 allowing the use of shorter gate times for better resolution. 1-6. A self-check mode of speration is also provided to verify proper overall performance of the digital circuitry and the display of the unit prior to use. 1-7. Several options are available with the Model 1920A. Each is listed by option number in Table 1-1. Accessories are listed and described in Table 2-1. Desired options must be specified at time of purchase. A detailed description of each option is included in Section 6, Options and Accessories.

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Service and User Manual
Manual Type:
Service and User Manual
Pages:
18
Size:
783.33 Kbytes (802127 Bytes)
Language:
english
Revision:
Manual-ID:
400101
Date:
Quality:
Scanned document, all readable.
Upload date:
08 February 2016
MD5:
c4e5031e4ad5298fe7bb76000ff6dda6
Downloads:
713

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Only the first few pages! A lot of pages are missing

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