Comparisons between the DSP-599zx and NIR-12

FEATURES	DSP-599zx	NIR-12
MIPS (millions instructions per second)	36.8 MIPS	10 Mips (per CPU)
CPU clock frequency	18.4 MHz crystal X2 = 36.8 MHz	40 MHz crystal /4 = 10 MHz
Instruction cycle time	27 ns	100 ns
Real time listening in noise reduction mode	Yes, 26 ms delay	No, 130 ms delay
Memory built into CPU	80 Kb	1.5 Kb
External Memory needed slows down CPU	No	Yes
Headphone level adjustment	Yes	No
Dual Audio Channels	Yes	No
Dual Radio Inputs (Radio A or B)	Yes	No
White Noise reduction	20 dB	20 dB
Noise reduction on when tuning	Yes (real time)	No (excessive delay)
Noise reduction Aggressiveness	Continuously variable	3 settings on back panel
Bandpass	100-5000 Hz	50-3400 Hz
LCD Display	Yes	No
Visible settings for precise tuning	Yes	No (approximate)
Input level indicators	2 LEDs (Normal & Overload)	1 LED (Overload)
Automatic Gain Control (AGC)	Yes	No
A/D-D/A Converter	Dual wide band 16 bit	14 bit
Programmable Memories	Yes (6)	No
Selectable Memory Mode on power up	Yes	No
Power Off Bypass	Both Speaker and Line Out	Speaker only
Power On Bypass	Yes	No
Frequency and Bandwidth controls	"feather touch" Optical Encoders	Pots
Case construction	1 piece extruded aluminum	bent sheet metal
Panel Markings	multi-color scratch-proof graphic overlay	one color screen printing directly on panel
Schematic provided	Yes	Yes, but unreadable
VOICE
Automatic Notch Multiple Tones	Yes	Yes
Manual Single Notch	Yes	No
Manual Dual Notch	Yes	No
Independent Tunable Lowpass & Highpass	HP 100-1000 Hz, LP 1000-5000 Hz	Bandpass only
CW
CW Bandwidth	10-600 Hz	50-3400 Hz
Center Frequency	200-2100 Hz	200-3400 Hz
Manual Notch on CW	Yes	No
CW Marker Tone for zero beat	Yes	No
CW tone Pitch Shift conversion	Yes	No
DATA
16 Data Filters	5 RTTY, SITOR, AMTOR, PacTor, G-TOR, HF Packet, WeFAX, SSTV, CLOVER, 3 User definable	None
Internal RTTY Modem (RS-232 o/p)	Yes	No
RTTY Remodulator	Yes	No
RTTY Test Signal RYRY...	Yes	No
RTTY Tuning Bar for Modem	Yes	No
Adjustable Line Output	Yes (-3 to -24 dBV)	No
Dual Data Jacks	Yes	No
Test Equipment Mode
Two Tone SSB Generator	Yes	No
Audio Sinewave Generator	Yes (20 Hz - 10 kHz)	No
Audio millivolt meter	Yes (4 to 2000 mv true RMS or Peak Frequency response 20 Hz-10 KHz)	No
CTCSS encoder	Yes (PL tones 67.0 to 254.1 Hz)	No
CTCSS decoder	Yes (direct readout)	No
CTCSS adjustable squelch switch	Yes (open collector output)	No
Meets FCC and European Standards	Yes	Yes

Note 1: This data based on sample of production units and instruction manuals from each manufacturer.
Note 2: View Specs for JPS CPU TMS320C26B