HP Cable Box 8591C manual Making a Measurement

C A U T I O N

Making a Measurement

Do not exceed the maximum input power.

The maximum input power for the HP 8591C is +72 dBmV (O-2 watt) continuous, 100 V dc (with 10 dB or more attenuation).

Let’s begin using the cable TV analyzer by measuring an input signal. Since the 300 MHz calibration signal (CAL OUT) is readily available, we will use it as our input signal.

You cannot hurt the cable TV analyzer by using the calibration signal and pressing any of the keys described in this section. Don’t be afraid to play with the knob, step keys, or number/units keypad. (If you have experimented with other keys and wish to return to a known state, press the green @KKK] key. >

1.First, turn the instrument on by pressing m). Wait for the power-up process to complete.

2.Press the green @ZZi) key.

3.Connect the cable TV analyzer CAL OUT to the INPUT 75 0 with an appropriate cable.

4.Set the frequency.

Press the [FREQUENCY] key. CENTER appears on the left side of the screen, indicating that the center-frequency function is active. The CENTER FREQ softkey label appears in inverse video to indicate that center frequency is the active function. The active function block is the space on the screen within the graticule where the center frequency messages appear. Functions appearing in this block are active: their values can be changed with the knob, step keys, or number/units keypad. Set the center frequency to 300 MHz with the DATA keys by pressing 300 IFvlHz). The knob and step keys can also be used to set the center frequency.

5.Set the span.

Press (SPAN). SPAN is now displayed in the active function block, and the SPAN softkey label appears in inverse video to indicate it is the active function. Reduce the span to 20 MHz by using the knob, pressing the down key ((7’J)), or pressing 20 LMHzJ.

6. Set the amplitude.

2-17