Instruction Manual

10
M2 User Manual
For AM analog broadcasts, the Demodulation Level Select switch is inhibited and the monaural audio
level is displayed on the Left meter; the level is calibrated from -64dB to +10dB.
For FM analog broadcasts, the Demodulation Level Select switch selects the Left and Right or L+R and
L–R demodulated audio levels to be displayed on the corresponding meter; blue LEDs indicate the user
selection.
The meters levels are peak responding between +10dB and –30dB, and average responding between
–30dB and –64dB. Either de-emphasized or pre-emphasized audio can be displayed; select pre-
emphasized audio by shorting internal De-Emphasis Jumper JP15 (left channel) and JP16 (right
channel).
Carrier Modulation Level Measurements. The 58-segment Carrier Modulation level LED meter
displays the analog carrier modulation for AM or FM signal indicated on monitor’s VFD. The Carrier
Modulation Select switch permits the user to select positive, negative or both carrier deviations to be
displayed on the carrier modulation meter. Blue LEDs indicate the user selection. The meter is
calibrated from 46% to 125% (for FM signals; for AM signals the M2.0X meter is calibrated to 105%.
The M2.2R Carrier Modulation level is accurate in AM to 125%.) The meter has user programmable
measurement integration times of 100, 200, 500 and 1000uSec; measurement integration times can be
changed using internal Time Integration Jumper JP1.
When an HD Radio
TM
station is being acquired but prior to an HD Locked LED indication, the analog
attributes of the HD Radio
TM
signal are displayed on the Demodulation Level meters. The Carrier
Modulation meter is blanked and the Carrier Modulation Select switch is inhibited for HD Radio
TM
MPS
and multicast signals after the HD Locked LED indication.
Data – Display Control. The DATA - DISPLAY control provides display of RBDS PI and RT fields
(M2.2R only) as well as PAD data for HD Radio
TM
signals. DATA - DISPLAY arrow LED illuminates
when mode is active. DATA - DISPLAY switch selects RBDS from the current analog broadcast or
PAD data from the current HD Radio
TM
MPS (HD-1) or HD-2 through HD-8 multicast signal to be
displayed on tuner’s VFD. Momentary push scrolls through each PAD field in the following sequence:
• Station long name
• Station program type
• Song title
• Artist
• Album
• Genre
• Comment
Subsequent momentary push of DATA - DISPLAY switch turns DATA - DISPLAY mode and DATA -
DISPLAY LED off. VFD display second line scrolls if longer than 16 characters. If there is no data for
the selected field, VFD display “NO” plus the data category; e.g., “NO ALBUM DATA.”
In the M2.2R, RBDS PI and RT fields are displayed per RBDS specifications. Station long name,
station short name and program type are processed as an ID3 tag. In all M2 models, HD Radio
TM
PAD
data; i.e., song title, artist, album, genre and comment fields are limited to 127 bytes each for a total of
1018 bytes per message per iBiquity
TM
specifications. For more information on ID3 tags and PAD data,
please visit www.ibiquity.com and www.id3.org.