Analog FM Modulation Monitor ® M2A-FM Ready User Manual
Welcome Thanks for purchasing the DaySequerra M2A-FM Analog Modulation Monitor. We design and build all of our DaySequerra products to be completely reliable and easy to use, so you can concentrate on producing great sounding broadcasts, not struggling with complicated equipment or difficult to use product manuals.
Table of Contents Important Safety Information 4 Service Information 4 Introduction 4 M2A-FM Key Features 5 M2A-FM Technical Specifications 6 Unpacking and Installing 6 Operating Description - Controls and Indicators 7 Alarm Configuration 7 SCA and AM Measurements 13 Alarm Connections 15 Ethernet Port Option 15 One Year Warranty 16 M2A-FM - Features • Brilliant, accurate bargraph metering of analog programming • Multi-function vacuum florescent display (VFD) shows decoded RBDS •
Important Safety Information • • • • • • • • • • Indoor use only. Not for use in wet or damp environments. Maximum Relative Humidity: <80% Class I Equipment (grounded type) Electrical rating: 100-120/220-240V~50-60Hz 18W Fuse Rating: 2A 250V 20MM AC Mains supply voltage fluctuations are not to exceed +10% of the nominal voltage Operations temperature range -40°C to 70°C Maximum altitude: 3000m (9843ft) Equipment suitable for continuous operation Weight: 5.4kg (12lbs) equipment only; 8.
In addition to its accuracy and features, the M2A-FM gives you audiophile grade Class-A biased audio outputs, so you can precisely monitor and adjust your processing. In addition to L and R analog outputs, the M2A-FM has a full-time digital output, so you can feed your AES monitoring chain, and a front panel headphone jack powered for uncompromised, full-quality audio.
M2A-FM Technical Specifications RF TUNING RANGE 87.9MHz to 108.1MHz in US 200kHz spacing (Export version has 100kHz spacing.) FM DE-EMPHASIS 75µsec (Export version has 50µsec de-emphasis.) RF USEABLE SENSITIVITY 15dBf for -30dB SNR referenced to 100% modulation IF REJECTION > 100dB for -30dB SNR AF BANDWIDTH + 1dB 20Hz to 18kHz AF THD+N < 0.
M2A-FM has been set at the factory to operate at 120VAC unless otherwise specified on the shipping carton. The M2A-FM export version is configured for 240VAC operation. Please connect your M2A-FM to an uninterruptible power supply (UPS) to protect against power surges and brownouts. Antenna Input Connections. 75ohm F-type connector is provided on the M2A-FM rear panel for an FM antenna. Rear panel switch selects for antenna or high-level sample port inputs (7VP-P max). Audio Output Connections.
All Alarms • Select “ON” to activate all alarms at the minimum threshold with the minimum alarm delay. Select “OFF” to set all alarms to off; select “SETUP” option to continue with alarm configuration menu. Use UP and DN switches to toggle the setting. Push “SELECT” switch to increment the menu to the next alarm function.
Alarm Output 2 – Audio Loss (Silence Detect) • Highlight desired “SET” or “OFF” option using UP and DN switches to toggle the setting. Select “SET” to set this alarm and continue with alarm configuration menu; select “OFF” to set this alarm function to off. Push “SELECT” to continue. A S > • • I < O L O S O S F F U W D I > O M E D L < E V H E I L G H Submenu for “Alarm Delay” with “30”, “60”, “120” and “240” second options is displayed next.
• If “SET” is selected, submenu for “Alarm Delay” with “30”, “60”, “120” and “240” second options is displayed next. Use UP and DN switches to toggle the setting and highlight the desired option. A 0 3 L > A 6 R 0 M < 1 2 D 0 E L 2 A 4 Y 0 S Push “SELECT” switch to save and increment the menu to the next alarm function. Alarm Output 4 – Pilot Present • P > Pilot Present alarm is factory set to alarm for a 19kHz pilot injection level of less than 2%.
• If “SET” is selected, submenu for “Alarm Delay” with “30”, “60”, “120” and “240” second options is displayed next. Use UP and DN switches to toggle the setting and highlight the desired option. A 0 3 L > A 6 R 0 M < 1 2 D 0 E L 2 A 4 Y 0 S Push “SELECT” switch to save and increment the menu to the next alarm function. Alarm Output 6 – Over Modulation • The Carrier Over Modulation alarm is factory set to alarm for a level over 105% by default.
Alarm Configuration Enable or Save • E Highlight desired “ENABLE” option to arm selected alarms and save alarm configuration or “SAVE” option to save alarm configuration without arming alarms. Use UP and DN switches to toggle the setting. A N L A A B R L M E C O > N S F A I V G E < Push “SELECT” to continue. The alarm configuration settings are saved in non-volatile memory.
DEMODULATION LEVEL SELECT – Front panel control permits user to select Left or L+R demodulated audio level to be displayed on top Demodulation Level meter, and Right or L–R demodulated audio level to be displayed on bottom Demodulation Level meter. Green LEDs indicate the user selection of display mode.
The VFD will now indicate the 19kHz pilot or subcarrier frequency to be measured as illustrated in the following sample: 1 C 9 a r k r H i z e P r i t l o o t E x i t A momentary push of the SELECT switch located between the DN and UP switches will start the measurement, with the resulting level indicated on Carrier Modulation LED display. The pilot-subcarrier levels are indicated on the top meter legend. The FM stereo pilot level is typically set to 9% injection.
From this point, the UP and DN switches can be used to select the next subcarrier frequency to be measured or the Carrier Modulation Select switch can be used to exit the Sub-Pilot injection level measurement mode. Note : The injection level display for 57kHz is one-half of the legend marked on the M2A-FM front panel. The front panel legend indications for 19kHz, 67kHz and 92kHz are correct as marked on the M2A-FM front panel.
DaySequerra – One Year Limited Warranty DaySequerra warrants this product to be free from defects in materials and workmanship to its original owner for one (1) year from the date of purchase. DaySequerra will repair or replace such product or part thereof that upon inspection by DaySequerra, is found to be defective in materials or workmanship subject to conditions contained herein. DaySequerra products are sold worldwide, through a network of authorized DaySequerra dealers and distributors.
