Hitachi EC701HP Operation Manual page 90

Section 5 - System Operation Manual
(E-Compact ATSC Transmitters - EC701HP thru EC708HP)
Items on the
SETUP menu
Power Setup
Transmitter Setup
Image Frequency
Suppression
LO Leakage
Suppression
Pre-Correction
Modulation Settings
Time and Date Setup Set time and date
Password Setup
Transport Stream
Alarms Mask
USB Host Access
Crest Factor
Clock Reference
Restore Web
Password to Default
Transistor Aging
Adjustment
PA Temperature Control
Manual Rev. 0.1 - February 2018
Program the RF output power level
Turn ON and turn OFF the ALC (Automatic Level Control)
Mute the or not the RF power output on the event of absence of
Transport Stream
Select local or remote the transmitter output level control.
TX Balance, eliminated the image frequencies band
Reduces the LO undesirable spurious
Enable and Disable the pre-correction circuitry
Turn ON and turn OFF the modulation
ATSC pilot level configuration (pilot level programming between
2.048 ~ +511 )
Password configuration
Configure three parameters with respect to the 2 TS inputs:
- TS input: Selects with one is preferable
- Mode: Automatic (automatically switches in the case one fails) /
Input Manual (does not switch even if it fails)
- Hold: On (hold the last input even if the preferable input stopped
failing) / Off (go back to the preferable input if has stopped failing)
Enable or disable conditions to generate alarms.
Selects one of three USB ports available on the 8001:
USB Setup
- Device Rear / Device Frontal: PC software GUI8001
- Host Frontal: USB flash drive for software upgrade
With USB Host Frontal selected use this menu and follow further
Setup instructions to make a software upgrade
Configure Crest Factor parameters to reduce the Peak to Average
Power Ratio in order to improve intermodulation on PA output at the
Reduction
expense of MER degradation
Set the priority list for exciter time base reference:
- User cal (free running): internal OCXO without a reference (+/-
50ppb)
- Internal GPS*: plug the antenna cable at the rear panel
- External 10 MHz
- External 1PPS
- Incoming TS: this mode is useful for M/H since pre-processor and
post-processor must be in the same time base.
Reset web page user name and password to default values. User:
user
Password: linear
Allows you to send the current settings for the power amplifiers.
The values are pre-set at the factory.
It allows you to set the operating temperature of the power amplifiers
drawer.
Description
5-14