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Flashcards in numbers tech related Deck (93)
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1

According to the C/N rule, each time the number of amplifiers doubles, the C/N gets worse by how much?

3 dB

2

Per FCC rules, signal leakage between 54 MHz and 216 MHz must not exceed what?

20 microvolts per meter at 3 meters

3

What is the typical bandwidth for C-band service?

500 MHz

4

What frequency range must a spectrum analyzer have in order to align satellite dishes?

950 MHz - 1450 MHz

5

All drop splitters must have a minimum return bandwidth of?

5 MHz to 42 MHz

6

What is the diameter, in microns, of a single mode fiber strand with the coating intact?

250 microns

7

"Four Nines" or 99.99% reliability allows for how many downtime minutes per customer per year? +/- 1 min.

52.42

8

What is the proper depth of modulation percentage of the properly balanced video carrier?

87.5

9

What is the maximum length of a series-6 drop that can be used in an underground installation?

150 feet

10

What is the maximum current output supported by the Vista 20P control panel?

600 mA

11

What is the maximum length for a coax jumper used between a wall plate and the CPE?

6 feet

12

When terminating an unused tap port, what must be included in the terminator?

Internal 75-ohm resistor

13

Per FCC rules, signal leakage between 54 Mhz and 216 Mhz must not exceed what?

20 microvolts per meter at 3 meters

14

What is the reference temperature to determine thermal noise level delivered to any load impedance?

68 degrees Fahrenheit (293.15 degrees Kelvin)

15

When making attachments to the strand, what is the minimum distance from the center of the pole that the attachment can be made?

30 inches

16

What is the minimum cable bend radius for series 6?

2.5 inch radius

17

What CLI figure of merit must be met in order to comply with Federal Communications Commission Standards?

<64

18

For each dB increase in input optical power (dBm), the RF output increases by how many dBmV?

2 dBmV

19

How much bandwidth is required when both video and audio broadcasts are sent via a satellite in analog format?

36 MHz

20

What is 1 per million as expressed in scientific notation?

1.0E-6

21

What is 1 millivolt equal to across a 75 ohm load?

0 dBmV

22

What is the typical 1550nm fiber loss in dB/km?

0.25(+/-.1dB)

23

When purchasing a fractional PRI, what is the minimum number of channels required per account?

6

24

What is the total bandwidth, to the nearest thousandth, required for a single 24-channel PRI circuit?

1.544 Mbps

25

What resistance is present in a circuit where 1 ampere of current dissipates 1 watt of power?

1 ohm

26

What is the FCC signal leakage limit for frequencies below 54 MHz and above 216 MHz?

15 microvolts/meter at 30 meters (100 feet)

27

What frequency does Comcast use for the MoCA channel?

1,150 MHz or 1.15 GHz

28

What is the minimum PHY rate required between the Media Hub and the terminal?

180 Mbps

29

When is the use of Series-11 or QR-320 permissible for an aerial drop?

Greater than 150 feet or in situations where it will improve signal levels to within acceptable ranges

30

What is the acceptable minimum tightening force for the connector on the port of a splitter?

20 inch lbs.