Tektronix NetTek YBT250, Руководство пользователя

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Locating Interference
YBT250 Field Transmitter & Interference Tester User Manual
3- 49
Sorting or Locking Scrambling Codes
You can sort or lock the current set of scrambling codes.
To sort the results, select one of the following choices:
H
Power (Ec)
to sort by descending Ec level. (See Figure 3--26.)
H
Scrambling Code (SC)
to sort by ascending Scrambling Code
index.
H
Lock Scrambling Codes to lock and hold the current set of
detected Scrambling Codes.
NOTE
. While Lock Scrambling Codes is enabled, if a new signal is
detected, the YBT250 will not display the new signal until Lock
Scrambling Codes is disabled.
To make accurate measurements of the forward link signals, use a
receive antenna with a frequency response and bandwidth that is
appropriate for the channel you are measuring. Use a high quality,
low-loss Band Pass Filter (BPF) to reject signals outside the signal
band. If you take measurements near a high-power transmitter, such
as commercial TV or radio, a BPF may be necessary for the scanner
to produce useable results.
To enter the attenuation values of the antenna, filter, and connecting
cable:
1.
Tap the
Edit
button.
2. Tap the Input tab.
3. Enter the dB attenuation loss value in the Attenuator Loss field.
4. Tap the OK button.