scope GEO40A - Electrical Specifications; Technical Specifications

SCOPE GEO40A User Manual
GEO40USER 2 of 10 Issue 1
 Max. 40 characters Power Up message
 Unread reminder
 DD/MM or MM/DD date display format selectable
 Normal or word wrap display mode
 Pre or Post time stamp facility
 30 – 180 seconds no alert period for repeated message
 ‘IN RANGE’ & ‘OUT RANGE’ indicator display mode & grace time setting
 On-line or OTA programming - for Public message receive mode only
2.3 Electrical Specification
• Rx Frequency 135MHz~175MHz; 278MHz-280.999MHz
448MHz-471.999MHz
• Sensitivity @1200bps
− Best position: 20.5dBµV/m 512ps; 22.5dBµV/m /1200bps
• Adjacent Channel Rejection > 60dB
• Spurious Rejection
135-174.999MHz;278-280.999MHz > 55dB
448-471.99MHz > 50dB
• Image Rejection
135-174.999MHz;278-280.999MHz >50dB /-42.8MHz; -910KHz
448-471.999MHz >40dB/-42.8MHz; 50dB/-910KHz
• Intermodulation Rejection >50dB
• Frequency stability +/- 10ppm
• Deviation Carrier +/- 4.5KHz
• Tone alert level > 80dBc at 30cm away
• Nominal Battery Life more than 30 days (‘AAA’ alkaline battery)
2.4 Technical Specification
• Code Format POCSAG
• Bit Rate 512/1200bps switchable
• Channel Space
− Receiver: 25KHz
• Modulation Method FSK-NRZ