Electrical & Test Equipment

Meter Voltage

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How do I correct a voltage change problem?

I currently have some professional sound equipment connected to a power/surge protector that, when initially connected, indicated a 120 volt connection. Now, for unknown reasons, the power/surge protector is flashing, indicating a change in voltage has occurred, and when a voltage meter was used to check the line, it indicated that a voltage of approximately 132 volts is now present. What could have happened, given that nothing has been changed, and what do I do to correct the problem?

You may have something else on the circuit that is drawing power - freezer, heat, water heater etc. When they come on your voltage drops to 120 and when they cycle off it jumps to 132.

Try another circuit.

Other possible causes are your house main box is overloaded or your power company is not able to keep up with demand.

Signal Level Meter S9808

The Signal Analysis Meter is a full-featured handheld signal performance meter providing a complete signal test system in easy-to-carry protective case. Signal Analysis Meter allows choice of 4 pre-programmed user-selectable band plans accessed via keypad entry for easy measurement of broadcast, CATV, CATV/HRC, and SUB/VHF channels. Direct-entry channel or frequency tuning selections provide maximum flexibility in head-ends and distribution networks that employ narrow digital signals or non-standard frequency applications. The meter displays instantaneous digital signal levels when testing digital carrier levels. The large LCD screen displays signal level as a bar-graph with digital numeric readout. This backlit display provides screen illumination in dimly lit work-spaces, allowing behind rack and night meter operation. Signal Analysis Meter enables testing of carrier-to-noise, multiple channels, and full, reduced, and single band scan for complete testing flexibility. The meter’s functions include not only signal measurement when AC/DC voltage is present under test, but, when selected, voltage-level display.

?Full-channel operation 5-870MHZ Frequency Range

?4-keypad channel plans (TV, CATV/STD,CATV/HRC,SUB/VHF) enable quick switching between sources

?Single keypad frequency or channel selection provides compatibility with channel, data, and other narrow bandwidth carriers

?Full spectrum-analyzer scan provides display of up to 100 channels simultaneously

?Carrier-to-noise testing provides accurate testing of system performance anywhere in the head-end or distribution system

?Large easy-to-read backlit Graphic LCD display provides quick-glance signal reference even in dimly lit work environments

?AC/DC voltage readings and compatibility allow measurements through input connector, enabling signal and voltage measurements when voltage is present in tested signal without costly adapters

?8-Hour rechargeable NiMH batteries provide cost savings

?Automatic power shut-off feature extends time between recharges

?Bright orange high impact plastic housing and soft leatherette-vinyl protective case with belt clip included

Specifications (All the technical indexes below are under indoor temperature 25?)

Frequency range:     5MHZ-870MHZ

Frequency resolution ratio: 10KHZ

Measured band width:     280KHZ

Level Measurement

Measurement range:   -35dBmV-60dBmV

Measurement accuracy: ± 1.5dB

Resolution ratio:       0.1dB

Method of detection: Peak detection

Input resistance:    75 ohm

Carrier-noise ratio (CN)

Signal input range:     ?10dBmV

Measurement accuracy:  +2dB

Voltage Measurement

 Input range:       0-80V AC/DC

 Measurement accuracy : ± 2V

 Resolution ratio:       0.1 V

Dimensions: 4.3”(L)x 2.6”(D)x 10.0”(H)

Weight:   2 lbs

About the Author

Established in 2000, Tianjin Sai Xun Tong electric technology CO;.LTD is a high-tech enterprise which specializes in designing, manufacturing and selling TV signal level meter and digital satellite finder to domestic and overseas market. Furthermore, we also provide a broad rage of related high quality products of broadcast and TV.
Our company has won a good reputation among customers in domestic and overseas for her outstanding products and services. Based on our advanced technology, excellent service system, and good reputation, we have developed very good relationships with many powerful domestic manufactures which trusted us most and appointed us as there exclusive agent in Tianjin area.
Moreover, our company has a good cooperation with many CATV network operators worldwide, including Southeast Asia, Middle East, Europe and America etc.
In conformity to the “people oriented” as management concept, our company never stops innovating and exploiting. We are making great efforts to satisfy all our customers with highest quality products and our best service.

Extending The Voltage Range Of Your Meter - Read Notes For Extending Current Range