RCA/ Thomson Consumer Electronics 
Refer to the back of the receiver. All RCA/TCE receivers, with the exception 
of the High-Definition IRDs, will have an eight character model number. 
The model number will be either DRDxxxRy or NRDxxxNy. xxx= model distinction 
within a generation. y=generation. The generation will be W, A, B, D, or E. Model numbers do not cross generations. 
W= 1st generation 
A= 2nd generation 
B= 3rd generation 
D= 4th generation 
E= 5th generation (also referred to as 4.5 gen) 

1st generation receivers are: DRD102RW , DRD203RW, NRD112NW 
2nd generation receivers are: DRD302RA, DRD303RA, NRD313NA, NRD412NA, DRD403RA, DRD703RA 
3rd generation receivers are: DRD502RB, DRD503RB, DRD505RB, NRD513NB, 
DRD515RB, DRD523RB (there were also some 503s produced as DRD503RBC, still third gen.) 
4th generation receivers are: DRD222RD, DRD221RD, DRD223RD, NRD215ND 
5th generation receivers are: DRD420RE, DRD440RE, DRD480RE 

Sony 
Refer to the front face plate of the unit (the fourth generation & newer 
do not have the model number printed on the back). Sony makes two models 
for each generation. An A series and a B series. All Sony DirecTV receivers 
follow this model number format: SAT-xy. Where x= series within a generation, 
either A or B, and y= generation, and will only be 1,2,3,4,50, or 55. The 
letters SAS are the complete system (dish included) model number, and are 
found nowhere on the receiver itself. 
SAT-A1 & SAT-B1~ 1st generation 
SAT-A2 & SAT-B2~ 2nd generation 
SAT-B3 & SAT-A4~ 3rd generation (I have never seen a Sony A-3, they may exist) 
SAT-A50 & SAT-B50~ 4th generation 
SAT-A55 & SAT-B55~ 5th generation or “plus” IRDs 

Hughes 
Refer only to the back of the receiver. There is a name plate with the 
model number on every Hughes ever produced. It will be HIRD-xy. 
Where x= generation, and y= distinction within that generation. X(gen)= A, B, C, D, 
or E. y=0,1, 2, 3, 4, or 6. With the fourth generation (and newer) Hughes, the model 
distinction translates as follows. 1=silver. 2=gold. 4=platinum. 6=Para Tados. 
The manual will add either a 1 or a 5 to the number that is printed on the back 
of the IRD on the fourth generation (and newer) models. The manual will state 
E11/E25, but the name plate (on back of IRD) will state E1 and E2, respectively. 
HIRD-A2, HIRD-A3~ 1st generation 
HIRD-B1, HIRD-B2, HIRD-B3, HIRD-B4~ 2nd generation 
HIRD-C2~ 3rd generation 
HIRD-D0, HIRD-D1, HIRD-D2, HIRD-D4~ 4th generation 
HIRD-E1, HIRD-E2, HIRD-E4, HIRD-E6 5th generation or “plus” IRD 

Miscellaneous 
These makes/models are all non-plus receivers. 
Toshiba~ TSR101, TSR-202 
Panasonic~ TU-IRD10, TU-IRD20 
Optimus~ system 5100 
Magnavox~ DBS500 
Memorex~ MSD5000 
Hitachi~??? 
Uniden~ ??? 
GE~ GRD33G2A, GRD33G3A 
ProScan~ PRD8630A, PRD8650B 

High Definition 
RCA, Hughes, ProScan, Zenith, Toshiba, Hitachi, Panasonic, Samsung & 
Mitsubishi have all released (or plan to release) either HDTV-compatible 
set-top boxes, or HDTV sets with DirectTV Plus receivers built in. Any High 
Definition capable DirecTv receiver would be considered a “plus” system and 
would be considered fifth generation or higher