5 PMM* – Mini Modulator Instruction and Operation Manual
IMPORTANT
WARNING: This product is not WATERPROOFED. To reduce risk of electrical shock, fire hazard, or
damage to the unit, do not expose to rain or moisture.
CAUTION: To prevent electric shock, do not connect power supply until the power connections to
the modulation have been made.
NOTE TO INSTALLER: This reminder calls the system installer’s attention to Article 80- of the
NEC that pro-vides guidelines for proper grounding and, in particular, specifies that the cable
ground shall be connected to the grounding system of the building, as close to the point of cable
entry as practical.
HEADEND BALANCING
1.
Let the headend warm up or “Burn-in” for at least hours prior to calibrating.
. Connect a calibrated RF signal meter or spectrum analyzer to the output of the highest
channel modulator.
3. Verify that the modulator is at 41 dBmV after the warm up time.
4. Connect modulator to the combiner.
5. Connect the RF signal meter or spectrum analyzer to the output of the headend. This
may be the combiner output or a distribution amplifier output.
6. Measure the highest channel to obtain the headend output level.
7. Keep the highest channel unchanged and attenuate the lower channels to match the
highest channel by reducing their RF Modulation output adjustment.
8. Fill headend balancing certificate with the headend output level, date, and signature.
9. Place the balancing certificate visible at the headend location.
