User Manual

WaveCom Electronics Inc
MA4040D Manual; MAN1L0901 REV 13(0104)
Approved: D.P.
46
Change Upper Frequency Limit
EuroDOCSIS specifies that the upper frequency limit shall be 858.0 MHz center. In order to accommodate
customers that would like to use WaveCom’s products for EuroDOCSIS, the user has the ability to modify standard
Upconverters with an upper frequency of 857.0 MHz center to an upper frequency limit of 858.0 MHz. Pressing the
Change Upper Frequency Limit button brings up the following dialog box:
Selecting “OK” from the dialog box will change the NVRAM on the Upconverter to reflect the new upper frequency
limit of 858.0 MHz. This only has to be done once per Upconverter. Selecting “Cancel” will have no effect on he
upper frequency limit.
* The Unit must be power cycled after changing the upper frequency limit on each Upconverter.
A dialog box will appear asking the user to power cycle the unit. Power cycle the unit, then
wait approximately 5 seconds before selecting “OK” to exit.
IF Power
IF Power (dB) displays the current IF power sensed at the input port. The IF power may be attenuated by 0 to
39.75 dB in 0.05 dB step sizes. Click on the Update IF Attenuation button to send the new attenuation setting to the
Upconverter. Entering an invalid attenuation value will generate a Error response.
IF Threshold Set
Clicking the IF Threshold Set button prompts for high and low IF threshold limits to be entered. The high IF
threshold limit may be 0.0 to 4.0 dB. The low IF threshold limit may be -4.0 to 0.0 dB. Initially, the low IF threshold
level is set to -4.0 dB and the high RF threshold is set to +4.0 dB.
IF AGC
IF AGC is current condition will be displayed in a box next to the IF AGC Enable button. This will show Enabled
when IF AGC is Enabled or Disabled if the IF AGC is currently disabled. To change the current sate of the IF AGC
simply click on the IF AGC Enable button or the IF AGC Disable button. The use of IF AGC for digital signals is
recommended.
IF AGC should be enabled for proper operation in redundant mode.
IF Threshold
IF Threshold current condition will be displayed in a box next to the IF Threshold Enable button. This will show
Enabled when IF Threshold is Enabled or Disabled if the IF Threshold is currently disabled. To change the current
sate of the IF Threshold sensing simply click on the IF Threshold Enable button or the IF Threshold Disable button
When IF Threshold is enabled, and the IF power is outside the IF Threshold limits, a non-critical alarm will be
triggered.